Battery 100% to 4% in a day!

My Fenix 5x updated itself the other day. I’m not on FW11 yet. Ever since the update my battery has had issues.

If I charge my battery to 100% it will be down to 4% within around 12 hours.

I haven’t done any activities and haven’t run any apps. Just left it on my wrist all day.

This keeps happening.

Is this a known issues and is there a fix?

0 ikim1967 over 6 years ago

Try a restart - that usually fixes that. Had it occur to me before.

0 Former Member over 6 years ago

I had to get a refurb to fix this.

0 Former Member over 6 years ago

99 to 4% overnight! similar has happened several times, despite factory resets as advised by garmin, and before that turning it off and on again. has anybody found a solution to this, short of sending it back.

0 Former Member over 6 years ago

Not to teach anyone to suck eggs. But you aren't using a watch face that polls the HR every second are you?

0 Former Member over 6 years ago

Watch has gone from full charge - or close to it - to way down overnight several times all by itself - so not on my wrist. I have kept the standard watch face. Turned it off/on several times, and did a factory reset twice. Issue continued. Someone suggested leaving it on full charge for several hours after it reaches 100% - I did this 2 days ago and it has been fine since. Fingers crossed!